How to identify correct HS codes

List of catalogs of this article:

• 1,How to identify correct HS codes What is the order of engine assembly?
• 2, Aviation engine assembly process and testing method
• 3, Engine assembly
• 4, What are the disassembly and processing technology and precautions of the engine?
• 5, Automotive engine assembly steps and notes
• 6, What are the equipments for the automobile engine assembly production line?

What is the order of engine assembly?

1. Take the camshaft overhead engine as an example, its assembly order is as follows: the installation of the crankshaft flywheel group is installed on the rear end flange disc of the crankshaft. When installing, two positioning bolts are first positioned, and then the nut is tightened. When the nut is tightened, the angle should be crossed, and the tightening moment is 137~147N·m.

2. The assembly process of the engine is generally based on the cylinder block, assembled from the inside to the outside. During the assembly process, it should be installed, checked and adjusted to ensure the assembly quality.

3. The whole process of the automobile engine assembly line is as follows: the bottom of the cylinder block is facing down, the cylinder block, crankshaft, camshaft feeding, cleaning, blowing, diesel engine model, marking printing. After the cylinder block is flipped 180°, type the number to confirm.After the cylinder is turned over, the bottom of the cylinder is facing up.

Aviation engine assembly process and testing method

1. Aviation engine assembly Process (I) Unit body assembly The assembly process of the aircraft engine requires the assembly of the unit body, which requires the assembly of various parts and accessories to form a unit body, and then the unit body is assembled to form the main unit body.In the process of assembly, accessories, parts and pipes need to be assembled.

2. Aviation engine installation and testing technology mainly studies the basic knowledge and skills of new aviation engine technology, aviation engine assembly technology, aviation engine test driving technology, etc., and conducts quality control and fault diagnosis of aviation engine assembly and test drive process in the field of aviation engine installation and test technology. Test and data processing in empty engine test drive, etc.

3. Before installing the piston connecting rod assembly into the engine, check its vertical error to make it meet the requirements. Lubricate the inner surface of the piston, piston ring and cylinder liner, and then install the piston connecting rod assembly into the cylinder liner with the piston ring clamp, as shown in Figure 8-1. Please pay attention to the following points when assembling: A. The marks on the shaft and the connecting rod cover should be consistent.

engine assembly

The installation of the piston ring is one of the consumable parts of the engine, and its installation quality directly affects the service life of the engine. When replacing the piston ring, pay attention to the following points: choose a qualified piston ring. When installing it on the piston, open the piston ring moderately with a special piston ring clamp to avoid too much force.

Before assembly, all parts, components, lubricating oil, tools, workbench, etc. It should be thoroughly cleaned and dried with compressed air. Before assembly, check all bolts and nuts and replace them if they do not meet the requirements; washers, gaskets, open pins, locks, lock wires, washers, etc. All should be replaced during the overhaul.

Take the camshaft overhead engine as an example, and its assembly order is as follows: the safety of the crankshaft flywheel groupInstall the flywheel on the rear flange disc of the crankshaft. When installing, use two positioning bolts to position it first, and then tighten the nut. When the nut is tightened, the angle should be crossed, and the tightening moment is 137~147N·m.

The assembly order of the engine varies depending on the engine structure, but the basic order is basically the same. Take the overhead camshaft engine as an example, its assembly order is as follows: Installation of crankshaft flywheel group: install the flywheel on the flange at the rear end of the crankshaft. When installing, first position it with two positioning bolts, and then tighten the nut.

Parts preparation and accompanying process parts, unpacking, cleaning, delivery assembly line. The process of assembly of engine parts. Cylinder head: press-install the valve oil seal → install the inlet door → install the valve lock clip → install the rocker arm assembly → install the inlet manifold → send the general assembly.

What are the disassembly and processing processes and precautions of the engine?

1. Precautions when disassembling the engine. The engine should be disassembled after cooling. After the engine is cooled, it should be disassembled. First, it is easy to disassemble, and second, it is easy to prevent deformation during disassembly, because the temperature is high, the rigidity is weakened, and it is easy to deform. Do not warp and deform the oil sup shell when disassembling.

2. Note: It is not allowed to plug in the cylinder head, so as not to cause damage to the cylinder pad. Put the engine on the side and check whether there are marks on the clutch cover and flywheel. If there are no marks, they should be made up. Then turn the crankshaft flywheel, remove the eight clutch fixing bolts symmetrically and evenly around the clutch cover, and remove the clutch assembly.

3. Remove the cylinder head fixing screw, and pay attention to the screw that the screw should be crossed and loosened from both ends to the middle. 2) Remove the cylinder cushion and pay attention to the installation direction of the cylinder cushion.3) Flip the engine and remove the oil span fixing screw (note that the screw should also be loosened from both ends to the middle). 4) Remove the oil span and oil spat.

Automotive engine assembly steps and notes

Engine Assembly Safety Operating Procedures 01 Before assembly, parts must be carefully cleaned to keep the equipment, tools and workplace clean. Pay attention to carefully check and thoroughly clean all lubrication channels on the cylinder block and crankshaft, and use compressed gas/02 interchangeable parts, such as cylinder block and flywheel shell, each piston connecting rod group and its corresponding cylinder, etc.

Installation steps of the piston ring 1) After cleaning the selected piston ring, classify it according to the air ring and oil ring, and pay attention to the cross-sectional structure and installation order.The side with the "TOP" mark on the piston ring of the Santana car must be installed facing up. 2) Install the oil ring first. For the combined oil ring, install the lining ring first, and then install the scraper.

Before assembly, all parts, components, lubricating oil, tools, workbench, etc. It should be thoroughly cleaned and dried with compressed air. Before assembly, check all bolts and nuts and replace them if they do not meet the requirements; washers, gaskets, open pins, locks, lock wires, washers, etc. All should be replaced during the overhaul.

Note that the upper edge groove of the piston and the convex point of the connecting rod body and the connecting rod cover are facing the same side, that is, the front of the engine).

Check all parts: After cleaning all parts, it is necessary to check all parts for damage or wear, and repair or replace them as needed. Enter according to the maintenance manual.Assembly: Finally, according to the requirements of the maintenance manual, all parts are assembled in the prescribed order and steps.

What are the equipments for the automobile engine assembly production line?

1. The equipment of the automobile engine assembly production line includes the engine assembly line and the cylinder head assembly line, including logistics system, pallet fixture, logistics trolley, tightening machine, marking machine, detection machine, pressing machine, flipping machine, suspension crane, steel structure, lighting fan system and other equipment and tools.

2. The production organization of assembly, production line, equipment, testing means, the degree of automation of assembly, etc. will be important topics in automobile manufacturing research.

3. Painting equipment: including the car bodyPainting and body parts painting are used to spray the body and body parts to provide protection and decorative effects. Body assembly line: used to assemble various functional parts and decorative parts into the car body, including the installation of battery packs, electric drive systems, seats, dashboards, doors and windows, etc.

4. The automobile engine assembly line mainly includes the general assembly line, sub-assembly line, workstation appliances and online tools, etc. In the general assembly line and subassembly line, flexible conveyor lines are commonly used in China to transport workpieces, and automated assembly equipment is configured online to improve efficiency. Flexible conveyor lines mainly include: friction roller and start-stop power roller.